Keep reading to learn How to Fix Brightness Won't Change on Windows 10/11, as here, we have everything that will help you.
When Windows' brightness adjustment stops working, it makes the adjusting of screen brightness through the slider or function keys ineffective to change anything, which then makes the screen too bright or too dark. Most often, this issue arises right after a Windows upgrade or after changes in drivers, showing that there is operating trouble in the system communicating with the display settings.
This usually happens after a major update because the display drivers become either outdated or incompatible. Corruption of system files or incompatibility with power settings, especially with the auto-brightness features enabled, is also another possible cause.
Several methods of resolving this will be discussed herein.
1. Adjust Brightness under Power Options
That is why the brightness setting doesn't always work because the display driver and the system's power settings aren't talking. Windows can resync the Display controls and change these settings to enhance the recognition of the system when you are changing brightness in Power Options in the Control Panel.
You can open the Power Options menu by hitting Windows key + R, after which you input 'powercfg.cpl' and then click on Enter.
Open Power Options and click on Change plan settings, then open Change advanced power settings.
Once the new window opens, go further down to Display, click the plus sign beside it to open the menu, then open the Display brightness menu. You can adjust the values to whatever you like.
Deselect the check box beside Enable adaptive brightness then proceed with steps above for Dimmed display brightness settings. Once the settings are set to your choice, click Apply. The screen brightness should be adjusted according to your settings.
2. Change Brightness Settings from Graphics Properties Menu
To change the display settings directly on the graphics hardware, the best route would be via the Graphics Properties Menu. You wouldn't have to deal with the mess of Windows's display controls falling apart due to driver difficulties or updates. From a compatibility and reliability standpoint, it's best to go straight to the control panel of the graphics card-be it Intel, AMD, or NVIDIA-to control brightness or make any improvements.
Note that the one below is for the Intel Graphics and Media Control Panel. Other drivers may have other screens pop up.
For Properties of the Graphics, right-click onto desktop and select that option.
Select Advanced Mode and click OK.
To adjust brightness up to your likings open menu for Display then click Color Enhancement and now you can adjust via slider.
Click the Apply button to save the new brightness level.
3. Update the Graphics Drivers
That's how easy it can be to fix brightness issues by updating your GPU drivers. Sometimes system upgrades cause outdated or corrupted drivers to stop working as intended. Update your drivers to make sure your display adapter is compatible with Windows 10 for the screen brightness settings in your control.
Open up Device Manager with the Windows key + R and type in 'devmgmt.msc', then press Enter.
Expand the Display adapters section in Device Manager and right-click your GPU to Update Driver.
In a laptop, there may be two GPUs appearing under the menu Display Adapters. For this, open the Integrated graphics like Intel(R) HD Graphics 3000 by right-clicking it.
Please click the "Search automatically for updated driver software" button to see if there is an updated version of the driver. If it does prompt you, please install the driver by following the on-screen instructions.
Important Note: Here, Windows will try to download the latest driver using your internet. You will need a stable internet connection for this process.
Restart your computer and check to see if the brightness is now adjustable with the new driver installed. If the search results in you already having the latest version, or it turns out the new driver does not change anything in your behavior, proceed with the steps below.
Launch Device Manager again and then right-click on your integrated GPU driver this time; select Update Driver.
This time, click Browse my computer for the driver program.
Please select Let me pick from a list of available drivers on my computer.
In the list, highlight Microsoft Basic Display Adapter, place a check in the box that says Show compatible devices, and then click Next.
Restart your computer again after installing the Basic Display Adapter driver. When it reboots, you can now sort out the problem.
For further details on what to do, see our article below.
4. Re-enable Generic PnP Monitor
This helps resolve issues arising from incorrect or outdated drivers and improper detection following updates to the system. Re-enabling the Generic PnP Monitor allows Windows to redetect the monitor. This refreshes the display settings, and brightness changes should once again work correctly.
Opening Device Manager is as easy as hitting Windows key + R, entering "devmgmt.msc," and press Enter.
It can be enabled by opening up the Device Manager, browsing to the Monitors section, right-clicking on it, and clicking Enable Device. Namely, the Generic PnP Monitor.
Restart the system and try to adjust your brightness once again.
5. Set the Display Type to Discrete in BIOS.
Open the BIOS on your Lenovo laptop and select the option "Discrete Graphics" to resolve any integrated graphics issue. This will forcibly enable the usage of the dedicated GPU on the system. In the case of driver updates or system updates where adjusting brightness is problematic, this should resolve the issue.
You can access your BIOS by pressing F2 during the boot. Head to the Configuration tab and change the Graphics Device from Switchable Graphics to Discrete Graphics. This should fix the problem courtesy of the manufacturer. Press F10 to save the changes with the machine not booting.
6. Fix Catalyst Bug with Registry Editor (ATI GPUs)
The settings of power management conflict with the brightness control, and you can actually disable it by editing specific registry entries. Now, the brightness adjustment is fully functional again since Windows is again communicating with the ATI drivers.
Press the Windows key + R, type "regedit," and press Enter to dive into Registry Editor.
In Registry Editor, find this key: The class for controls in the Windows registry is 4d36e968-e325-11ce-bfc1-08002be10318.
Double-click to set its value to 0: MD_EnableBrightnessIf2. Continue pursuing until you reach: KMD_EnableBrightnessInterface2.
Go into the following: HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlClass{4d36e968-e325-11ce-bfc1-08002be10318}001.
Place 0 into MD_EnableBrightnessIf2 and KMD_EnableBrightnessInterface2.
Restart your computer when you exit Registry Editor. By the time it boots up, the screen brightness problem should be resolved and the control regained.
8. Adjusting Screen Brightness via PowerShell
You can manually override it if the default settings are not working; you can open system settings through PowerShell. With several running commands, it may fix the issues caused by corrupted drivers or system updates by bypassing broken interfaces and restoring proper functionality.
To open with administrator privileges, right-click the Start menu and select Windows PowerShell Admin.
Click the "Brightness Level" button to display what your current setting is. Get-WmiObject -WmiMonitorBrightness -From-Root/WMI -Namespace root/WMI
Before you can make the change, you need to find out what your instance of your display is named with the below command: ${(Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).Name of Instance}
The following command will let you change the brightness in the range of 0 to 100. Replace "BrightnessLevel" with the required brightness and "InstanceName" with the actual name you received from the previous command. Give it a thought: Using the following command: Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods -Filter "InstanceName = 'InstanceName'" End.
If the command succeeded, then the brightness of your screen should have changed automatically to the value you just set immediately.
We at askkissy hope we were able to assist you the most through our guide How to Fix Brightness Won't Change on Windows 10/11.
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